Thank you CCP Guard, but we would only consider this a quick fix.
Please, do bring a long term solution to this problem because I can assure you whoever was behind those farms can easily be back up and running again in as little as a couple days if he wants to.
The warp scrambling plex rats idea the other guy had, and making plex rats overall more dynamic, was a way to start looking. Not to mention it would bring more interesting prospects for pvp, should one forget to kill the rat before warping out, for instance. I would also make rats hit a lot harder than they do currently, or even scale its dps up as they pop and the timer proceeds …
Your consideration is much appreciated !